Zinc Couplings | McMaster-Carr

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209 Products

About Conduit

Vacuum Fittings for Steel Tubing

Use these fittings in an air vacuum system to avoid the hassle of brazing and welding. Insert two fittings into a clamp and tighten to form a secure seal in steel tubing.

Metal Garden Hose Fittings

Attach these fittings to garden hose for a variety of water supply applications. They are metal for better durability than plastic garden hose fittings.

Wye-Shaped On/Off Valves
with Garden Hose Threads

Convert one faucet into two, four, or five convenient outlets.

Power Transmission

Single U-Joints

Connect and transfer torque between two shafts that are misaligned at an angle.

Internally Threaded Ball Joint Linkages

These linkages offer excellent wear resistance. They consist of internally threaded ball joint rod ends with a ball stud attached to simplify mounting.

Internally Threaded Inline Ball Joint Linkages

Use these linkages to create inline pivoting connections. They have internal threads on one end and external threads on the other.

Conduit and Fittings

Connectors for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Join pieces of conduit.

Adapters for Medium-Wall (IMC)
and Thick-Wall (Rigid) Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Thin-Wall (EMT) Steel Conduit

Join pieces of conduit.

Adapters for Thin-Wall (EMT) Steel Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Reducers for Thin-Wall (EMT) Steel Conduit

Connect different sizes of conduit.

Flexible Conduit and Fittings

Fittings for Liquid-Tight Flexible Metal Conduit

These fittings seal out liquids when connecting liquid-tight flexible metal conduit to a knockout in an outlet box or enclosure.

Adapters for Flexible Metal Conduit

Attach conduit to a knockout in an outlet box or enclosure.

Connectors for Flexible Metal Conduit

Join pieces of conduit.

Adapters for Flexible Metal
Conduit and Armored Cable

Attach conduit and armored cable to a knockout in an outlet box or enclosure.

Conduit Adapters

Transition between types of conduit.

Conduit Reducing Adapters

Transition between conduit sizes and types.

Press-Fit Framing and Fittings

No need for fasteners—friction holds this framing together. Use press-fit framing and fittings to assemble carts, enclosures, and partitions.